21 ×
3
7
6
6
2 ÷
2
1
20 ×
5
4
42 ×
6
5 ÷
5
30 ×
2
168×
4
3
7
1
7
1
5
24 ×
6
4
2
3
3
10 ×
5
2
3
1
28 ×
7
4
84 ×
6
1
504×
3
4
15 ×
5
60 ×
2
6
7
2 ÷
4
6
7
3
5
1
1
2
2
4 ÷
4
1
7
7
90 ×
6
3
5